What are Municipal Bonds? Define this term.

Municipal bonds are debt instruments issued through US local, state or county governments to finance public interest projects. These bonds are not default-free and are not as liquid like Treasury bonds. Actually, such bonds are generally secured onto their own revenues and not guaranteed through central government. Though, they pay lower interest rates than Treasury bonds. The purpose for this is about their interest payments is exempt by federal taxation, and therefore this determines an implicit raise in the actual interest rates received through investors.